diff --git a/api/v2/markdown_service.go b/api/v2/markdown_service.go
index 78a9d735a..3fe6d059e 100644
--- a/api/v2/markdown_service.go
+++ b/api/v2/markdown_service.go
@@ -88,6 +88,8 @@ func convertFromASTNode(rawNode ast.Node) *apiv2pb.Node {
 		node.Node = &apiv2pb.Node_EscapingCharacterNode{EscapingCharacterNode: &apiv2pb.EscapingCharacterNode{Symbol: n.Symbol}}
 	case *ast.Math:
 		node.Node = &apiv2pb.Node_MathNode{MathNode: &apiv2pb.MathNode{Content: n.Content}}
+	case *ast.Highlight:
+		node.Node = &apiv2pb.Node_HighlightNode{HighlightNode: &apiv2pb.HighlightNode{Content: n.Content}}
 	default:
 		node.Node = &apiv2pb.Node_TextNode{TextNode: &apiv2pb.TextNode{}}
 	}
@@ -157,6 +159,8 @@ func convertToASTNode(node *apiv2pb.Node) ast.Node {
 		return &ast.EscapingCharacter{Symbol: n.EscapingCharacterNode.Symbol}
 	case *apiv2pb.Node_MathNode:
 		return &ast.Math{Content: n.MathNode.Content}
+	case *apiv2pb.Node_HighlightNode:
+		return &ast.Highlight{Content: n.HighlightNode.Content}
 	default:
 		return &ast.Text{}
 	}
diff --git a/proto/api/v2/markdown_service.proto b/proto/api/v2/markdown_service.proto
index 4f28584c1..4ddcc257f 100644
--- a/proto/api/v2/markdown_service.proto
+++ b/proto/api/v2/markdown_service.proto
@@ -47,6 +47,7 @@ enum NodeType {
   STRIKETHROUGH = 20;
   ESCAPING_CHARACTER = 21;
   MATH = 22;
+  HIGHLIGHT = 23;
 }
 
 message Node {
@@ -74,6 +75,7 @@ message Node {
     StrikethroughNode strikethrough_node = 21;
     EscapingCharacterNode escaping_character_node = 22;
     MathNode math_node = 23;
+    HighlightNode highlight_node = 24;
   }
 }
 
@@ -177,3 +179,7 @@ message EscapingCharacterNode {
 message MathNode {
   string content = 1;
 }
+
+message HighlightNode {
+  string content = 1;
+}
diff --git a/proto/buf.lock b/proto/buf.lock
index 2c703b6f4..d029c4dc7 100644
--- a/proto/buf.lock
+++ b/proto/buf.lock
@@ -4,10 +4,10 @@ deps:
   - remote: buf.build
     owner: googleapis
     repository: googleapis
-    commit: 711e289f6a384c4caeebaff7c6931ade
-    digest: shake256:e08fb55dad7469f69df00304eed31427d2d1576e9aab31e6bf86642688e04caaf0372f15fe6974cf79432779a635b3ea401ca69c943976dc42749524e4c25d94
+    commit: a86849a25cc04f4dbe9b15ddddfbc488
+    digest: shake256:e19143328f8cbfe13fc226aeee5e63773ca494693a72740a7560664270039a380d94a1344234b88c7691311460df9a9b1c2982190d0a2612eae80368718e1943
   - remote: buf.build
     owner: grpc-ecosystem
     repository: grpc-gateway
-    commit: fed2dcdcfd694403ad51cd3c94957830
-    digest: shake256:ed076a21e3d772892fc465ced0e4dd50f9dba86fdd4473920eaa25efa4807644e8e021be423dcfcee74bf4242e7e57422393f9b1abb10acb18ea1a5df509bb19
+    commit: 3f42134f4c564983838425bc43c7a65f
+    digest: shake256:3d11d4c0fe5e05fda0131afefbce233940e27f0c31c5d4e385686aea58ccd30f72053f61af432fa83f1fc11cda57f5f18ca3da26a29064f73c5a0d076bba8d92
diff --git a/proto/gen/api/v2/README.md b/proto/gen/api/v2/README.md
index 17c028519..5506f798d 100644
--- a/proto/gen/api/v2/README.md
+++ b/proto/gen/api/v2/README.md
@@ -74,6 +74,7 @@
     - [CodeNode](#memos-api-v2-CodeNode)
     - [EscapingCharacterNode](#memos-api-v2-EscapingCharacterNode)
     - [HeadingNode](#memos-api-v2-HeadingNode)
+    - [HighlightNode](#memos-api-v2-HighlightNode)
     - [HorizontalRuleNode](#memos-api-v2-HorizontalRuleNode)
     - [ImageNode](#memos-api-v2-ImageNode)
     - [ItalicNode](#memos-api-v2-ItalicNode)
@@ -1084,6 +1085,21 @@
 
 
 
+<a name="memos-api-v2-HighlightNode"></a>
+
+### HighlightNode
+
+
+
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| content | [string](#string) |  |  |
+
+
+
+
+
+
 <a name="memos-api-v2-HorizontalRuleNode"></a>
 
 ### HorizontalRuleNode
@@ -1218,6 +1234,7 @@
 | strikethrough_node | [StrikethroughNode](#memos-api-v2-StrikethroughNode) |  |  |
 | escaping_character_node | [EscapingCharacterNode](#memos-api-v2-EscapingCharacterNode) |  |  |
 | math_node | [MathNode](#memos-api-v2-MathNode) |  |  |
+| highlight_node | [HighlightNode](#memos-api-v2-HighlightNode) |  |  |
 
 
 
@@ -1398,6 +1415,7 @@
 | STRIKETHROUGH | 20 |  |
 | ESCAPING_CHARACTER | 21 |  |
 | MATH | 22 |  |
+| HIGHLIGHT | 23 |  |
 
 
  
diff --git a/proto/gen/api/v2/markdown_service.pb.go b/proto/gen/api/v2/markdown_service.pb.go
index 235806430..158c0d344 100644
--- a/proto/gen/api/v2/markdown_service.pb.go
+++ b/proto/gen/api/v2/markdown_service.pb.go
@@ -47,6 +47,7 @@ const (
 	NodeType_STRIKETHROUGH      NodeType = 20
 	NodeType_ESCAPING_CHARACTER NodeType = 21
 	NodeType_MATH               NodeType = 22
+	NodeType_HIGHLIGHT          NodeType = 23
 )
 
 // Enum value maps for NodeType.
@@ -75,6 +76,7 @@ var (
 		20: "STRIKETHROUGH",
 		21: "ESCAPING_CHARACTER",
 		22: "MATH",
+		23: "HIGHLIGHT",
 	}
 	NodeType_value = map[string]int32{
 		"NODE_UNSPECIFIED":   0,
@@ -100,6 +102,7 @@ var (
 		"STRIKETHROUGH":      20,
 		"ESCAPING_CHARACTER": 21,
 		"MATH":               22,
+		"HIGHLIGHT":          23,
 	}
 )
 
@@ -254,6 +257,7 @@ type Node struct {
 	//	*Node_StrikethroughNode
 	//	*Node_EscapingCharacterNode
 	//	*Node_MathNode
+	//	*Node_HighlightNode
 	Node isNode_Node `protobuf_oneof:"node"`
 }
 
@@ -457,6 +461,13 @@ func (x *Node) GetMathNode() *MathNode {
 	return nil
 }
 
+func (x *Node) GetHighlightNode() *HighlightNode {
+	if x, ok := x.GetNode().(*Node_HighlightNode); ok {
+		return x.HighlightNode
+	}
+	return nil
+}
+
 type isNode_Node interface {
 	isNode_Node()
 }
@@ -549,6 +560,10 @@ type Node_MathNode struct {
 	MathNode *MathNode `protobuf:"bytes,23,opt,name=math_node,json=mathNode,proto3,oneof"`
 }
 
+type Node_HighlightNode struct {
+	HighlightNode *HighlightNode `protobuf:"bytes,24,opt,name=highlight_node,json=highlightNode,proto3,oneof"`
+}
+
 func (*Node_LineBreakNode) isNode_Node() {}
 
 func (*Node_ParagraphNode) isNode_Node() {}
@@ -593,6 +608,8 @@ func (*Node_EscapingCharacterNode) isNode_Node() {}
 
 func (*Node_MathNode) isNode_Node() {}
 
+func (*Node_HighlightNode) isNode_Node() {}
+
 type LineBreakNode struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1738,6 +1755,53 @@ func (x *MathNode) GetContent() string {
 	return ""
 }
 
+type HighlightNode struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Content string `protobuf:"bytes,1,opt,name=content,proto3" json:"content,omitempty"`
+}
+
+func (x *HighlightNode) Reset() {
+	*x = HighlightNode{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_api_v2_markdown_service_proto_msgTypes[25]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *HighlightNode) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*HighlightNode) ProtoMessage() {}
+
+func (x *HighlightNode) ProtoReflect() protoreflect.Message {
+	mi := &file_api_v2_markdown_service_proto_msgTypes[25]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use HighlightNode.ProtoReflect.Descriptor instead.
+func (*HighlightNode) Descriptor() ([]byte, []int) {
+	return file_api_v2_markdown_service_proto_rawDescGZIP(), []int{25}
+}
+
+func (x *HighlightNode) GetContent() string {
+	if x != nil {
+		return x.Content
+	}
+	return ""
+}
+
 var File_api_v2_markdown_service_proto protoreflect.FileDescriptor
 
 var file_api_v2_markdown_service_proto_rawDesc = []byte{
@@ -1753,7 +1817,7 @@ var file_api_v2_markdown_service_proto_rawDesc = []byte{
 	0x52, 0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x12, 0x28, 0x0a, 0x05, 0x6e, 0x6f, 0x64, 0x65,
 	0x73, 0x18, 0x01, 0x20, 0x03, 0x28, 0x0b, 0x32, 0x12, 0x2e, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e,
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+	0x65, 0x73, 0x22, 0xdb, 0x0c, 0x0a, 0x04, 0x4e, 0x6f, 0x64, 0x65, 0x12, 0x2a, 0x0a, 0x04, 0x74,
 	0x79, 0x70, 0x65, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0e, 0x32, 0x16, 0x2e, 0x6d, 0x65, 0x6d, 0x6f,
 	0x73, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x76, 0x32, 0x2e, 0x4e, 0x6f, 0x64, 0x65, 0x54, 0x79, 0x70,
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@@ -1850,117 +1914,125 @@ var file_api_v2_markdown_service_proto_rawDesc = []byte{
 	0x61, 0x74, 0x68, 0x5f, 0x6e, 0x6f, 0x64, 0x65, 0x18, 0x17, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x16,
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+	0x44, 0x10, 0x0c, 0x12, 0x0a, 0x0a, 0x06, 0x49, 0x54, 0x41, 0x4c, 0x49, 0x43, 0x10, 0x0d, 0x12,
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+	0x43, 0x41, 0x50, 0x49, 0x4e, 0x47, 0x5f, 0x43, 0x48, 0x41, 0x52, 0x41, 0x43, 0x54, 0x45, 0x52,
+	0x10, 0x15, 0x12, 0x08, 0x0a, 0x04, 0x4d, 0x41, 0x54, 0x48, 0x10, 0x16, 0x12, 0x0d, 0x0a, 0x09,
+	0x48, 0x49, 0x47, 0x48, 0x4c, 0x49, 0x47, 0x48, 0x54, 0x10, 0x17, 0x32, 0x88, 0x01, 0x0a, 0x0f,
 	0x4d, 0x61, 0x72, 0x6b, 0x64, 0x6f, 0x77, 0x6e, 0x53, 0x65, 0x72, 0x76, 0x69, 0x63, 0x65, 0x12,
 	0x75, 0x0a, 0x0d, 0x50, 0x61, 0x72, 0x73, 0x65, 0x4d, 0x61, 0x72, 0x6b, 0x64, 0x6f, 0x77, 0x6e,
 	0x12, 0x22, 0x2e, 0x6d, 0x65, 0x6d, 0x6f, 0x73, 0x2e, 0x61, 0x70, 0x69, 0x2e, 0x76, 0x32, 0x2e,
@@ -1996,7 +2068,7 @@ func file_api_v2_markdown_service_proto_rawDescGZIP() []byte {
 }
 
 var file_api_v2_markdown_service_proto_enumTypes = make([]protoimpl.EnumInfo, 1)
-var file_api_v2_markdown_service_proto_msgTypes = make([]protoimpl.MessageInfo, 25)
+var file_api_v2_markdown_service_proto_msgTypes = make([]protoimpl.MessageInfo, 26)
 var file_api_v2_markdown_service_proto_goTypes = []interface{}{
 	(NodeType)(0),                 // 0: memos.api.v2.NodeType
 	(*ParseMarkdownRequest)(nil),  // 1: memos.api.v2.ParseMarkdownRequest
@@ -2024,6 +2096,7 @@ var file_api_v2_markdown_service_proto_goTypes = []interface{}{
 	(*StrikethroughNode)(nil),     // 23: memos.api.v2.StrikethroughNode
 	(*EscapingCharacterNode)(nil), // 24: memos.api.v2.EscapingCharacterNode
 	(*MathNode)(nil),              // 25: memos.api.v2.MathNode
+	(*HighlightNode)(nil),         // 26: memos.api.v2.HighlightNode
 }
 var file_api_v2_markdown_service_proto_depIdxs = []int32{
 	3,  // 0: memos.api.v2.ParseMarkdownResponse.nodes:type_name -> memos.api.v2.Node
@@ -2050,20 +2123,21 @@ var file_api_v2_markdown_service_proto_depIdxs = []int32{
 	23, // 21: memos.api.v2.Node.strikethrough_node:type_name -> memos.api.v2.StrikethroughNode
 	24, // 22: memos.api.v2.Node.escaping_character_node:type_name -> memos.api.v2.EscapingCharacterNode
 	25, // 23: memos.api.v2.Node.math_node:type_name -> memos.api.v2.MathNode
-	3,  // 24: memos.api.v2.ParagraphNode.children:type_name -> memos.api.v2.Node
-	3,  // 25: memos.api.v2.HeadingNode.children:type_name -> memos.api.v2.Node
-	3,  // 26: memos.api.v2.BlockquoteNode.children:type_name -> memos.api.v2.Node
-	3,  // 27: memos.api.v2.OrderedListNode.children:type_name -> memos.api.v2.Node
-	3,  // 28: memos.api.v2.UnorderedListNode.children:type_name -> memos.api.v2.Node
-	3,  // 29: memos.api.v2.TaskListNode.children:type_name -> memos.api.v2.Node
-	3,  // 30: memos.api.v2.BoldNode.children:type_name -> memos.api.v2.Node
-	1,  // 31: memos.api.v2.MarkdownService.ParseMarkdown:input_type -> memos.api.v2.ParseMarkdownRequest
-	2,  // 32: memos.api.v2.MarkdownService.ParseMarkdown:output_type -> memos.api.v2.ParseMarkdownResponse
-	32, // [32:33] is the sub-list for method output_type
-	31, // [31:32] is the sub-list for method input_type
-	31, // [31:31] is the sub-list for extension type_name
-	31, // [31:31] is the sub-list for extension extendee
-	0,  // [0:31] is the sub-list for field type_name
+	26, // 24: memos.api.v2.Node.highlight_node:type_name -> memos.api.v2.HighlightNode
+	3,  // 25: memos.api.v2.ParagraphNode.children:type_name -> memos.api.v2.Node
+	3,  // 26: memos.api.v2.HeadingNode.children:type_name -> memos.api.v2.Node
+	3,  // 27: memos.api.v2.BlockquoteNode.children:type_name -> memos.api.v2.Node
+	3,  // 28: memos.api.v2.OrderedListNode.children:type_name -> memos.api.v2.Node
+	3,  // 29: memos.api.v2.UnorderedListNode.children:type_name -> memos.api.v2.Node
+	3,  // 30: memos.api.v2.TaskListNode.children:type_name -> memos.api.v2.Node
+	3,  // 31: memos.api.v2.BoldNode.children:type_name -> memos.api.v2.Node
+	1,  // 32: memos.api.v2.MarkdownService.ParseMarkdown:input_type -> memos.api.v2.ParseMarkdownRequest
+	2,  // 33: memos.api.v2.MarkdownService.ParseMarkdown:output_type -> memos.api.v2.ParseMarkdownResponse
+	33, // [33:34] is the sub-list for method output_type
+	32, // [32:33] is the sub-list for method input_type
+	32, // [32:32] is the sub-list for extension type_name
+	32, // [32:32] is the sub-list for extension extendee
+	0,  // [0:32] is the sub-list for field type_name
 }
 
 func init() { file_api_v2_markdown_service_proto_init() }
@@ -2372,6 +2446,18 @@ func file_api_v2_markdown_service_proto_init() {
 				return nil
 			}
 		}
+		file_api_v2_markdown_service_proto_msgTypes[25].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*HighlightNode); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	file_api_v2_markdown_service_proto_msgTypes[2].OneofWrappers = []interface{}{
 		(*Node_LineBreakNode)(nil),
@@ -2396,6 +2482,7 @@ func file_api_v2_markdown_service_proto_init() {
 		(*Node_StrikethroughNode)(nil),
 		(*Node_EscapingCharacterNode)(nil),
 		(*Node_MathNode)(nil),
+		(*Node_HighlightNode)(nil),
 	}
 	type x struct{}
 	out := protoimpl.TypeBuilder{
@@ -2403,7 +2490,7 @@ func file_api_v2_markdown_service_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_api_v2_markdown_service_proto_rawDesc,
 			NumEnums:      1,
-			NumMessages:   25,
+			NumMessages:   26,
 			NumExtensions: 0,
 			NumServices:   1,
 		},
diff --git a/web/src/components/MemoContent/Highlight.tsx b/web/src/components/MemoContent/Highlight.tsx
new file mode 100644
index 000000000..0946d6996
--- /dev/null
+++ b/web/src/components/MemoContent/Highlight.tsx
@@ -0,0 +1,9 @@
+interface Props {
+  content: string;
+}
+
+const Highlight: React.FC<Props> = ({ content }: Props) => {
+  return <mark>{content}</mark>;
+};
+
+export default Highlight;
diff --git a/web/src/components/MemoContent/Renderer.tsx b/web/src/components/MemoContent/Renderer.tsx
index c2b7677a3..64efe05da 100644
--- a/web/src/components/MemoContent/Renderer.tsx
+++ b/web/src/components/MemoContent/Renderer.tsx
@@ -7,6 +7,7 @@ import {
   CodeNode,
   EscapingCharacterNode,
   HeadingNode,
+  HighlightNode,
   HorizontalRuleNode,
   ImageNode,
   ItalicNode,
@@ -29,6 +30,7 @@ import Code from "./Code";
 import CodeBlock from "./CodeBlock";
 import EscapingCharacter from "./EscapingCharacter";
 import Heading from "./Heading";
+import Highlight from "./Highlight";
 import HorizontalRule from "./HorizontalRule";
 import Image from "./Image";
 import Italic from "./Italic";
@@ -92,6 +94,8 @@ const Renderer: React.FC<Props> = ({ index, node }: Props) => {
       return <Strikethrough {...(node.strikethroughNode as StrikethroughNode)} />;
     case NodeType.MATH:
       return <Math {...(node.mathNode as MathNode)} />;
+    case NodeType.HIGHLIGHT:
+      return <Highlight {...(node.highlightNode as HighlightNode)} />;
     case NodeType.ESCAPING_CHARACTER:
       return <EscapingCharacter {...(node.escapingCharacterNode as EscapingCharacterNode)} />;
     default:
diff --git a/web/src/components/MemoEditor/ActionButton/MarkdownMenu.tsx b/web/src/components/MemoEditor/ActionButton/MarkdownMenu.tsx
index eba86aa56..af0b51490 100644
--- a/web/src/components/MemoEditor/ActionButton/MarkdownMenu.tsx
+++ b/web/src/components/MemoEditor/ActionButton/MarkdownMenu.tsx
@@ -1,4 +1,5 @@
 import { Dropdown, IconButton, Menu, MenuButton, MenuItem } from "@mui/joy";
+import { Link } from "@mui/joy";
 import toast from "react-hot-toast";
 import Icon from "@/components/Icon";
 import showPreviewMarkdownDialog from "@/components/PreviewMarkdownDialog";
@@ -93,6 +94,11 @@ const MarkdownMenu = (props: Props) => {
           <Icon.GanttSquare className="w-4 h-auto" />
           <span>Preview</span>
         </MenuItem>
+        <div className="-mt-0.5 pl-2">
+          <Link fontSize={12} href="https://www.usememos.com/docs/getting-started/content-syntax" target="_blank">
+            Content syntax
+          </Link>
+        </div>
       </Menu>
     </Dropdown>
   );